--- title: "Key Technical Design Decisions for Building an Educational App with LLMs" url: https://daily.dev/posts/key-technical-design-decisions-for-building-an-educational-app-with-llms-7dtdca1mw source_url: https://www.freecodecamp.org/news/technical-design-decisions-educational-app-llms type: article source: "freeCodeCamp" published: 2026-06-04T06:38:54.039Z updated: 2026-06-07T17:50:55.004Z tags: ["llm", "react-native", "claude", "firebase", "edtech"] reading_time: 13 upvotes: 2 comments: 1 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Key Technical Design Decisions for Building an Educational App with LLMs **[freeCodeCamp](https://daily.dev/sources/freecodecamp)** · 13 min read · 2 upvotes · 1 comments ## Summary A developer shares technical design decisions made while prototyping an open-source educational mobile app using Claude Code. Key decisions covered include: choosing Claude Sonnet over Haiku or Opus for balancing cost, quality, and latency; switching from Supabase to Firebase after discovering Supabase was blocked in India; using single-input AI activity generation with strict JSON schemas instead of conversational chat; implementing two-layer machine translation (static i18n + Google Translate API for dynamic content); and optimizing for low-bandwidth users via image compression and text-only AI calls. The author emphasizes that AI-assisted development still requires critical human judgment at every step, especially for infrastructure and tradeoff decisions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Lessons from taking an idea to a live app with AI](https://daily.dev/posts/lessons-from-taking-an-idea-to-a-live-app-with-ai-ibg8c8ymr) · Medium · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#react-native](https://daily.dev/tags/react-native), [#claude](https://daily.dev/tags/claude), [#firebase](https://daily.dev/tags/firebase), [#edtech](https://daily.dev/tags/edtech) [View this post on daily.dev](https://daily.dev/posts/key-technical-design-decisions-for-building-an-educational-app-with-llms-7dtdca1mw)